EP4126434A1 - VERFAHREN ZUR FESTLEGUNG VON SCHWEIßPARAMETERN FÜR EINEN SCHWEIßPROZESS AN EINEM WERKSTÜCK UND SCHWEIßVORRICHTUNG ZUR DURCHFÜHRUNG EINES SCHWEIßPROZESSES AN EINEM WERKSTÜCK MIT FESTGELEGTEN SCHWEIßPARAMETERN - Google Patents
VERFAHREN ZUR FESTLEGUNG VON SCHWEIßPARAMETERN FÜR EINEN SCHWEIßPROZESS AN EINEM WERKSTÜCK UND SCHWEIßVORRICHTUNG ZUR DURCHFÜHRUNG EINES SCHWEIßPROZESSES AN EINEM WERKSTÜCK MIT FESTGELEGTEN SCHWEIßPARAMETERNInfo
- Publication number
- EP4126434A1 EP4126434A1 EP22701381.0A EP22701381A EP4126434A1 EP 4126434 A1 EP4126434 A1 EP 4126434A1 EP 22701381 A EP22701381 A EP 22701381A EP 4126434 A1 EP4126434 A1 EP 4126434A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- welding
- workpiece
- along
- path
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 307
- 238000000034 method Methods 0.000 title claims abstract description 145
- 230000008569 process Effects 0.000 title claims abstract description 115
- 238000001816 cooling Methods 0.000 claims abstract description 147
- 238000012545 processing Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 238000001931 thermography Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000009832 plasma treatment Methods 0.000 claims description 2
- 230000006399 behavior Effects 0.000 description 27
- 238000012360 testing method Methods 0.000 description 11
- 238000009826 distribution Methods 0.000 description 7
- 238000004088 simulation Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
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- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
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- 230000007613 environmental effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/003—Cooling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
- B23K9/0953—Monitoring or automatic control of welding parameters using computing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
- B23K9/0956—Monitoring or automatic control of welding parameters using sensing means, e.g. optical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
Definitions
- the invention relates to a method for determining welding parameters for a welding process on a workpiece, in which a welding torch attached to a robot is guided over the workpiece along a predetermined welding path and predetermined welding parameters for processing the workpiece are set depending on the position along the welding path .
- the present invention relates to a welding device for carrying out a welding process on a workpiece with specified welding parameters, with a welding torch attached to a robot, which can be guided along a predetermined welding path over the workpiece during the welding process, the welding torch being connected to a welding power source which welding power source has a control device for controlling the welding process with predetermined welding parameters depending on the position along the welding track.
- the present invention mainly relates to automated, robot-assisted welding methods and welding devices, in which the welding torch is guided automatically along a predetermined welding path over the workpiece or additively manufactures a workpiece (Wire-Arc Additive Manufacturing WAAM). Both welding processes with consumable welding electrodes (MIG/MAG welding processes) and with non-consumable welding electrodes (TIG welding processes) are included. Theoretically, an application in manual welding processes is also conceivable.
- the invention also relates to arc soldering, in which, in contrast to welding, there is no significant melting of the workpiece.
- arc welding processes an additional material is usually melted to form a weld joint, the workpiece to be welded is melted and a weld seam is made. forms .
- the quality of the welded joint depends to a large extent on the course of the cooling process of the welded seam over time. This cooling process over time depends on the thermal energy introduced, the temperature of the workpiece and the clamping devices, as well as the local geometry of the workpiece and the clamping devices, the ambient temperature or Workpiece base temperature and the respective material properties (specific heat capacity and thermal conductivity).
- the geometry of the work piece and the geometry and arrangement of fixtures around the weld in conjunction with the physical parameters of the different materials mainly influence and define the cooling process of a weld.
- WO 2018/011243 A1 discloses a method for determining welding parameters for a welding process, in which the welding parameters are automatically determined using ideal welding parameters previously recorded on test workpieces, depending on the current position and arrangement of the workpiece in relation to the gravitational acceleration vector and the current Tangential vector of the weld path can be defined. Although it is mentioned that the cooling situation can be taken into account, no details are disclosed as to how the real cooling situation of the workpiece should be taken into account when automatically setting welding parameters.
- US 2015/0375325 A1 describes a method in which the temperature or a temperature change of the workpiece is detected before the welding process and welding parameters are selected accordingly depending on the measured temperature.
- the heat to be introduced into the workpiece can be adjusted to the current temperature and exceeding a maximum permissible temperature can be prevented.
- WO 2013/113993 A1 describes a method of the type in question, in which, in order to achieve a specific welding quality or a desired metallurgical structure, the welding parameters are adjusted depending on a desired cooling behavior.
- US Pat. No. 4,817,020 A describes a laser machining process, for example a laser welding process, in which the cooling rate is determined during the machining process and the machining parameters are adapted to it in real time.
- the object of the present invention is to provide an above-mentioned method for determining welding parameters and to create a welding device for carrying out a welding process on a workpiece with specified welding parameters, the actual cooling situation on the real workpiece being taken into account in order to be able to improve the welding quality and reproducibility of the weld.
- the method and the device should be able to be implemented as simply and inexpensively as possible and no expensive welding experts should be called in or prior test welds should be carried out on test workpieces. Disadvantages of known methods and devices should be avoided or at least reduced.
- the object of the invention is achieved in terms of the method in that, before the welding process is carried out, at least one parameter representing the cooling is recorded as a function of the position along the welding path, and the at least one parameter representing the cooling along the welding path is recorded when determining optimized welding parameters as a function of the Position along the weld path is taken into account for the welding process. It is intended to record the cooling behavior on the surface of the real workpiece along the welding path before the welding process, taking into account the geometry of the workpiece including the clamping devices arranged on it, and from this at least one suitable parameter that describes the respective cooling situation in the form of a suitable descriptive variable along the intended Welding path represents to determine and to take this into account in the subsequent welding process.
- the cooling situation is determined, among other things, by the material properties and dimensions (dimensions) of the workpieces, the seam geometry, the gap between the workpieces to be joined, the basic temperature of the workpieces, the material properties, the size and arrangement of the clamping devices and the ambient temperature, which of course affects the workpiece Base temperature determined , affected .
- the basic workpiece temperature is also influenced by a welding process and can have an impact on the subsequent welding processes if the workpiece has not yet cooled down before the subsequent welding process.
- WAAM additive welding processes
- the at least one parameter representing the cooling When the at least one parameter representing the cooling is recorded, the real workpiece is not melted or not significantly melted, or the structure is changed.
- the subsequent welding process can be better controlled via the at least one newly determined parameter representing the cooling and certain welding parameters, such as the welding power, the welding speed, or other welding or movement parameters can be adjusted or adjusted accordingly. be optimized, whereby the welding quality is increased and, above all, a better reproducibility of the welding can be achieved.
- the higher effort consists only in the recording of at least one parameter representing the cooling before the welding process is carried out, which, however, can also be carried out much more quickly than the welding process and can also be carried out by means of a simulation on a virtual workpiece replicating the real workpiece.
- the simplest countermeasures in the event of a different cooling situation include adjusting the welding parameters. For example, increased local cooling can be counteracted by increasing the welding power.
- the distance between the welding torch and the workpiece, the angle of attack, the welding speed, the relative positioning of the welding torch to the workpiece and other process parameters can be changed in order to obtain a weld with optimum quality (so-called OK or "OK" weld).
- the Countermeasures can also include active, local workpiece heating or workpiece cooling, whereby these could be used, for example, during a cleaning process before the welding process of the clamping devices, which changes the heat dissipation between the workpiece and the environment.
- the consideration of the real cooling situation of the real workpiece is essential and advantageous. At least two parameters representing the cooling are preferably recorded along the welding path and taken into account when determining optimized welding parameters depending on the position along the welding path, one parameter representing the cooling being the basic workpiece temperature along the welding path.
- the workpiece before the welding process is carried out, the workpiece is heated along the welding path with a heat source and the at least one parameter representing the cooling is recorded along the welding path using at least one detection device.
- a suitable and well-defined heat source with a known power density distribution and a suitable detection device for determining the temperature on the surface of the workpiece along the weld path, a descriptive variable for the local cooling along the weld path can thus be determined. From the knowledge of this cooling information, corrections of the welding parameters are derived during the welding process by taking this cooling information into account accordingly.
- the heat source can z. B. be formed by laser, TIG, plasma, or gas torch and has a known power density distribution.
- the energy of the heat source introduced into the workpiece, the local distribution of the heat input and the speed of movement are matched to the performance of the subsequent welding process and the respective welding task.
- the line energy used i. H . the power factor divided by the movement speed, selected in such a way that there is little or no melting of the workpiece and no changes in the structure or geometry of the workpiece, but on the other hand there is a sufficient temperature change for the detection device used.
- the workpiece can be heated in pulses along the welding path, preferably to a temperature below the melting temperature of the workpiece, and the response to the heat pulse can be recorded with the aid of the at least one detection device and parameters determined from this, which determine the cooling behavior of the workpiece along the welding path represent, be derived or computed.
- the workpiece can also be heated along the welding path with a light source, in particular a laser beam source, as the heat source.
- a light source in particular a laser beam source
- the intensity of the light source, in particular the laser beam source is selected in such a way that there is no disruptive melting or melting. Structural change in the workpiece occurs.
- the at least one parameter representing the cooling along the welding path can be recorded without contact, for example with the aid of a thermal imaging camera, in particular an infrared camera, as a detection device.
- a thermal imaging camera in particular an infrared camera
- the local distribution of the heat from the heat source there is also a local temperature distribution with the area covered by the detection device.
- the temperature distribution of all workpieces and components involved, such as clamping devices, along and in an area around the welding path is recorded or measured with the thermal imaging camera. measured .
- the local expansion of the detection preferably corresponds to the size of the heat-affected zone or the expansion of the workpiece or the workpieces through the at least one heat source.
- the at least one parameter representing the cooling can be recorded along the welding path with the aid of at least one temperature sensor as a detection device on the surface of the workpiece.
- the basic workpiece temperature in addition to, in particular during, the recording of the at least one parameter representing the cooling along the weld path, can also be recorded.
- the basic workpiece temperature can be taken into account when determining the cooling behavior of the workpiece. This can be an advantage, for example, when welding in extreme ambient temperatures.
- the at least one parameter representing the cooling is recorded along the weld path during a cleaning process carried out before the welding process, in particular a surface plasma treatment process, time can be saved since the recording of the parameter representing the cooling is recorded at the same time as the cleaning process carried out anyway.
- a virtual replica of the workpiece along a virtual welding path corresponding to the welding path can also be heated with a virtual heat source and the at least one parameter representing the cooling can be recorded along the virtual welding path with the aid of at least one virtual detection device , i.e. calculated or be simulated.
- the virtual simulation can be approximated via the definition of the cross section of the welding arrangement at several points of the welding path and can be approximated by interpolation in between.
- the determination of the cooling behavior can therefore be simulated on a virtual workpiece.
- a user can use appropriate software or a smartphone app to simulate the real workpiece, including the clamping devices, and thereby define a cooling situation.
- the cooling behavior can be simulated and corresponding parameters representing the cooling of the virtual workpiece can be recorded along the virtual welding path. become men . If the cooling behavior is determined in a simulation, the power or Power distribution can be chosen practically freely. In addition, non-linear effects in the temperature line in the workpiece can also be realistically simulated. In the simulation, problems that can arise in a real measurement due to the movement of the heat source and the detection device over the workpiece and their influence can be eliminated. During the simulation, the exact temperature can be determined at any point on the workpiece. The information about the thermal behavior of different workpieces can be determined in practice using test workpieces.
- a model of the real welding process can be used as a virtual heat source and the observed cooling situation with at least one parameter representing the cooling (preferably at least two parameters representing the cooling, one parameter being the workpiece base temperature) can be used to calculate the model parameters so to improve for a long time until an ideal welding result is obtained .
- the at least one parameter representing the cooling can be determined without a virtual heat source from the material properties and geometric conditions of the workpiece and the clamping devices, since the current cooling situation with known parameters representing the cooling is derived from known "building blocks".
- the method can be implemented, for example, with a program on a computer, the smartphone or a robot controller, and the cooling situation can thus be easily estimated and taken into account even by a welder who is not necessarily well trained.
- the process of recording the at least one cooling representing parameters along the welding path can be carried out at a speed which is higher than or equal to the welding speed during the welding process. If the speed is selected higher, the time for detecting the cooling behavior of the workpiece can be reduced.
- the mean cooling rate can be recorded as a parameter representing the cooling.
- the average cooling rate represents a parameter that is relatively easy to record and process.
- Other parameters can, for example, be extracted and derived from the thermal imaging cameras recorded using special image processing methods.
- a warning can be issued and/or or a message can be saved. This allows points along the weld path to be pointed out where thermal management is particularly critical.
- the warning can be given to the person or place of interest in the form of acoustic, optical or mechanical information.
- the object according to the invention is also achieved by a welding device of the present type, with a recording device for recording at least one parameter representing the cooling as a function of the position along the welding path before the welding process is carried out, and the control device being connected to the recording device and for controlling the welding process is formed with optimized welding parameters depending on the position along the welding path, taking into account the at least one parameter representing the cooling along the welding path.
- a welding device must be upgraded accordingly.
- many components such as cameras, temperature sensors and, of course, corresponding control devices are already present in many welding devices and only need to be adapted or replaced for the use described. program to be mated .
- the recording device for recording the at least one parameter representing the cooling along the welding path includes a heat source for heating the workpiece along the welding path and at least one detection device for recording the at least one parameter representing the cooling along the welding path.
- the welding device is moved with the heat source and detection device activated before the welding process is carried out or during the welding process in advance of the welding process along the welding path in order to be able to record at least one parameter representing the cooling, which is correspondingly taken into account in the subsequent welding process.
- the heat source for heating the workpiece along the welding path can be formed by a light source, in particular a laser beam source. This represents a simple form of heat source that is relatively easy to implement.
- the heat source is preferably designed to heat the workpiece along the welding path to a temperature below the melting temperature of the workpiece and also below that temperature which influences the structure of the workpiece.
- At least one detection device can be formed, for example, by a thermal imaging camera, in particular an infrared camera.
- At least one detection device can be formed by at least one temperature sensor for measuring the temperature of the surface of the workpiece along the welding path.
- the at least one temperature sensor can on the one hand to determine the cooling behavior and on the other hand to determine the Workpiece temperature can be used before the welding process. As already mentioned above, the temperature of the workpiece also influences the cooling behavior.
- this basic workpiece temperature can be taken into account when recording the at least one parameter representing the cooling down along the welding path.
- the recording device for recording the at least one parameter representing the cooling along the welding path can also include a virtual heat source for heating a virtual replica of the workpiece along a virtual welding path corresponding to the welding path and at least one virtual detection device for recording the at least one parameter representing the cooling along the include virtual weld path.
- the virtual heat source can also be formed by the virtual welding process.
- Fig. 1 shows a schematic illustration of a welding device which is designed to record a parameter representing the cooling down along the welding path of a workpiece before the welding process is carried out;
- Fig. 2 shows a block diagram of an embodiment of a recording device for recording a parameter representing the cooling along the weld path
- Fig. 3 shows a schematic block diagram of a virtual recording device for recording at least one parameter representing the cooling along the virtual welding path of a virtual workpiece
- Fig. 4 shows a schematic representation of a welding device while a welding process is being carried out, taking into account at least one parameter representing the cooling recorded before the welding process when determining the welding parameters;
- Fig. 5A to 5C different clamping situations of a workpiece to illustrate the resulting different cooling behavior along the weld path;
- Fig. 6A and 6B two cooling curves over time with different cooling behavior and different temperatures of the workpiece.
- Fig. 7 shows the time course of a method carried out before the welding process for recording at least one parameter representing cooling along the welding path of a workpiece and the subsequent welding process taking into account the at least one parameter representing cooling when determining the welding parameters.
- Fig. 1 shows a schematic representation of a welding device 1, which is designed to record a parameter P K (x) representing the cooling down along the welding path 3 of a workpiece 4 before a welding process is carried out.
- the welding device 1 is used to carry out a welding process on a workpiece 4 with specified welding parameters P ⁇ (x) depending on the position x along the welding path 3 .
- a welding torch 2 is attached to a robot 11 , which guides the welding torch 2 along a predetermined welding path 3 over the workpiece 4 during the welding process and creates a welded connection between two or more workpieces 4 or a coating of a workpiece 4 .
- the welding torch 2 is connected to the welding power source 12, whose control device 13 controls or controls the welding process and the corresponding specified welding parameters P ⁇ (x). regulates .
- the workpiece 4 is held in the desired position via clamping devices 17 .
- specific welding parameters P ⁇ (x) for the welding process are determined on the basis of experience or previous test welds on test workpieces, and the welding process is carried out independently of the respective cooling situation.
- ADJUSTED SHEET (RULE 91) ISA/EP According to the invention, it is now provided that before the welding process is carried out, at least one parameter P K (x) representing the cooling is recorded along the welding path 3, and the at least one parameter P K (x) representing the cooling is recorded along the welding path 3 when determining optimized welding parameters P1 ; Opt (x) is taken into account depending on the position x along the welding path 3 for the welding process.
- a recording device 15 on the robot 11 which heats the workpiece 4 before the welding process and detects the cooling behavior and from this derives or calculates at least one parameter P K (x) representing the cooling. calculated .
- the cooling behavior of the workpiece 4 is thus analyzed under the real conditions, taking into account the geometry and arrangements of the clamping devices 17 and taking into account the geometry of the workpiece 4 and taking into account the ambient conditions, in order to include the respective cooling behavior in the definition of the optimized welding parameters Pi, O p t (x) to be able to incorporate .
- the consideration of the parameters P K (x) that can represent the cooling when determining the optimized welding parameters Pi, Op t (x) for an optimal welding result and maximum welding quality can take place in a wide variety of ways. For example, at points along the weld path 3 of the workpiece 4 with good or rapid cooling behavior with a lower welding speed or higher welding power than in areas with slower cooling behavior.
- the welding quality can also be improved by preheating the workpiece 4 at certain points, taking into account the cooling behavior of the workpiece 4 at these points.
- the robot 11 moves with the recording device 15 along the desired welding path 3 and heats the workpiece 4 to a temperature which is preferably below the melting temperature of the material of the workpiece 4 and also below that temperature which could lead to a structural change in the material of the workpiece 4 .
- the surface temperature of the workpiece 4 is detected and evaluated, and from this at least one the cooling representative parameter P K (x), for example the cooling rate AT/At.
- the parameters P K (x) representing the cooling are stored in a database 18 or stored in memory.
- a correction can be made using the optimized welding parameters Pi, Opt ( x ) taking into account the cooling behavior of the real workpiece 4 .
- the memory 18 can be located at different points in the welding system and can also be integrated into the welding power source 12 , for example.
- the process of recording the at least one cooling-representing parameter P K (x) along the welding path 3 can be carried out at a speed v A that is higher than or equal to the usual welding speed v s during the welding process.
- the at least one parameter P K (x) representing the cooling can also be recorded along the welding path 3 directly prior to the welding process or during a cleaning process to be carried out before the welding process.
- Fig. 2 shows a block diagram of an embodiment of a recording device 15 for recording a parameter P K (x) representing the cooling along the welding path 3 of a workpiece 4.
- the receiving device 15 contains a heat source 5 with which the workpiece 4 is heated to a temperature which is below the melting temperature of the material of the workpiece 4 and below the temperature at which the structure of the workpiece 4 is changed. The heating of the workpiece 4 along the welding path 3 can take place, for example, in a pulsed manner.
- the heat source 5 can be formed by a light source 7 , in particular a laser beam source 8 .
- the at least one parameter P K (x) representing the cooling along the welding path 3 is recorded without contact using at least one detection device 6, which can be formed by a thermal imaging camera 9, in particular an infrared camera. Instead of or in addition to a thermal imaging camera 9 , at least one temperature sensor 10 or an array of several temperature sensors 10 can also be used to detect the temperature on the surface of the workpiece 4 .
- the basic workpiece temperature Tu can also be recorded with the help of at least one temperature sensor 14 .
- a warning for example in acoustic or optical form
- P KG (x) the cooling exceeds certain limit values P KG (x)
- a warning could be issued in order to draw the user's attention to an impermissible or critical cooling situation.
- the user can then take appropriate countermeasures, such as relocating clamping devices or preheating or cooling the workpiece 4, in order to once again comply with the limit values P KG (x).
- a corresponding message can also be stored for documentation purposes.
- FIG. 3 shows a schematic block diagram of a virtual recording device 15' for recording at least one parameter P K (x) representing the cooling along the virtual welding path 3' of a virtual workpiece 4'.
- the virtual workpiece 4' is simulated together with the virtual clamping devices 17' on a computer 16 or a mobile device, such as a smartphone, and before the welding process is carried out, the virtual replica 4' of the workpiece 4 along a virtual path corresponding to the welding path 3 Welding track 3' with a virtual heat source 5' or heated up during the virtual welding process itself and the at least one parameter P K (x) representing the cooling down along the virtual welding path 3' is recorded or calculated with the aid of at least one virtual detection device 6'. simulated .
- the parameters P K (x) representing the cooling are stored in a database 18 or stored in memory.
- the software required for this accesses stored information on the thermal conductivity properties of various materials for the workpieces 4 and clamping devices 17, which was determined beforehand. By means of such a simulation, different situations can be tried out before the welding process is carried out, without a real workpiece 4 having to be used.
- easily and quickly optimized welding parameters P 1; Opt (x ) depending on the respective Seeing cooling situation of the workpiece 4 can be adjusted in order to achieve the best welding qualities in each case.
- Fig. 4 is a schematic representation of a welding device 1 while a welding process is being carried out, taking into account at least one parameter P K (x) recorded before the welding process and representing cooling when determining optimized welding parameters Pi, Op t (x). The determined before the implementation of the welding process and in a database 18 or the like. Stored parameters P K (x) depending on the point along the weld path 3 for correction or. Changes in the specified welding parameters P ⁇ (x) are taken into account and thus optimized welding parameters Pi, opt (x) are determined, with which the welding process is carried out. In this way, taking into account the cooling behavior of the workpiece 4 , an optimum quality of the weld seam is achieved along the welding path 3 of the workpiece. In addition, external measures, such as preheating the workpiece 4, can influence the cooling behavior of the workpiece and a higher welding quality can be achieved.
- Fig. 5A to 5C show different clamping situations of a workpiece 4 to illustrate the resulting different cooling behavior along the weld path 3.
- the jigs are placed very close to the weld path 3 . This results in maximum cooling.
- the jigs are placed at a greater distance from the weld path, resulting in normal cooling of the weld.
- the clamping devices 17 are arranged very far away from the welding path 3 and cover only a very short area of the workpiece 4. This variant results in a minimal cooling effect due to the clamping devices.
- Fig. 6A and 6B show cooling curves over time with different cooling behavior and different temperature T of the workpiece 4 .
- Fig. 6A shows the cooling curve over time of a workpiece 4 without prior heating (curve A) and with prior heating (curve B).
- FIG. 6B shows the cooling over time of a workpiece 4 with normal cooling (curve A) and strong cooling (curve B).
- Fig. 7 is the time course of a method carried out before the welding process for recording at least one parameter P K (x) representing the cooling along the welding path 3 of a workpiece 4 and the subsequent welding process, taking into account the at least one parameter P K (x) representing the cooling the definition of the optimized welding parameters Pi, O p t (x) .
- phase I of recording the parameters P K (x) representing the cooling of the workpiece 4 can also take place at a higher speed v A than the subsequent welding process (phase II), which runs at a lower speed v s .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Theoretical Computer Science (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21153236.1A EP4032649A1 (de) | 2021-01-25 | 2021-01-25 | Verfahren zur festlegung von schweissparametern für einen schweissprozess an einem werkstück und schweissvorrichtung zur durchführung eines schweissprozesses an einem werkstück mit festgelegten schweissparametern |
PCT/EP2022/051480 WO2022157354A1 (de) | 2021-01-25 | 2022-01-24 | VERFAHREN ZUR FESTLEGUNG VON SCHWEIßPARAMETERN FÜR EINEN SCHWEIßPROZESS AN EINEM WERKSTÜCK UND SCHWEIßVORRICHTUNG ZUR DURCHFÜHRUNG EINES SCHWEIßPROZESSES AN EINEM WERKSTÜCK MIT FESTGELEGTEN SCHWEIßPARAMETERN |
Publications (2)
Publication Number | Publication Date |
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EP4126434A1 true EP4126434A1 (de) | 2023-02-08 |
EP4126434B1 EP4126434B1 (de) | 2023-08-30 |
Family
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21153236.1A Withdrawn EP4032649A1 (de) | 2021-01-25 | 2021-01-25 | Verfahren zur festlegung von schweissparametern für einen schweissprozess an einem werkstück und schweissvorrichtung zur durchführung eines schweissprozesses an einem werkstück mit festgelegten schweissparametern |
EP22701381.0A Active EP4126434B1 (de) | 2021-01-25 | 2022-01-24 | Verfahren zur festlegung von schweissparametern für einen schweissprozess an einem werkstück und schweissvorrichtung zur durchführung eines schweissprozesses an einem werkstück mit festgelegten schweissparametern |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP21153236.1A Withdrawn EP4032649A1 (de) | 2021-01-25 | 2021-01-25 | Verfahren zur festlegung von schweissparametern für einen schweissprozess an einem werkstück und schweissvorrichtung zur durchführung eines schweissprozesses an einem werkstück mit festgelegten schweissparametern |
Country Status (4)
Country | Link |
---|---|
US (1) | US20230234153A1 (de) |
EP (2) | EP4032649A1 (de) |
CN (1) | CN115768580A (de) |
WO (1) | WO2022157354A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN117260074B (zh) * | 2023-09-21 | 2024-06-04 | 广州盛美电气设备有限公司 | 一种焊接自动化控制方法、装置、设备及介质 |
CN117206768B (zh) * | 2023-11-09 | 2024-01-26 | 江苏海德曼新材料股份有限公司 | 一种铝单板结构焊接智能控制系统 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4375026A (en) * | 1981-05-29 | 1983-02-22 | The United States Of America As Represented By The Secretary Of The Army | Weld quality monitor |
US4817020A (en) * | 1987-06-22 | 1989-03-28 | General Electric Company | Cooling rate determination apparatus for laser material processing |
US5750954A (en) * | 1996-09-30 | 1998-05-12 | General Electric Company | Water exclusion device for underwater welding |
PL218257B1 (pl) * | 2009-11-16 | 2014-10-31 | Inst Spawalnictwa | Sposób i stanowisko do wyznaczania punktów charakterystycznych przemian strukturalnych w stalach w warunkach cykli cieplnych spawania |
FI124209B (fi) * | 2012-01-31 | 2014-05-15 | Kemppi Oy | Menetelmä hitsauslaitteen hitsausparametrien säätämiseksi |
US9700953B2 (en) | 2014-06-25 | 2017-07-11 | Honda Motor Co., Ltd. | Adaptive welding apparatus, control system, and method of controlling an adaptive welding apparatus |
US10417934B2 (en) * | 2014-11-05 | 2019-09-17 | Illinois Tool Works Inc. | System and method of reviewing weld data |
EP3269487A1 (de) | 2016-07-12 | 2018-01-17 | Fronius International GmbH | Verfahren zur festlegung von schweissparametern für einen schweissprozess |
-
2021
- 2021-01-25 EP EP21153236.1A patent/EP4032649A1/de not_active Withdrawn
-
2022
- 2022-01-24 US US17/926,722 patent/US20230234153A1/en active Pending
- 2022-01-24 CN CN202280005181.XA patent/CN115768580A/zh active Pending
- 2022-01-24 EP EP22701381.0A patent/EP4126434B1/de active Active
- 2022-01-24 WO PCT/EP2022/051480 patent/WO2022157354A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
EP4126434B1 (de) | 2023-08-30 |
CN115768580A (zh) | 2023-03-07 |
US20230234153A1 (en) | 2023-07-27 |
WO2022157354A1 (de) | 2022-07-28 |
EP4032649A1 (de) | 2022-07-27 |
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